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→Profiles
The big word in the Kemper world is '''profile''', which is a set of data that the KPA uses to reproduce the sound of a real rig. The profiling ''process'' sends a special signal from the KPA into the guitar amp (or device), and the signal from the mic'ed cab (or other output source) is sent back to the KPA, where it is analyzed and turned into a profile.
The KPA was designed primarily to capture the sound of a tube amp running into a mic'ed guitar cabinet. With this idea, the KPA split splits the resulting profile into two parts: an '''ampprofile''' profile and a '''cabprofile''' profile. The cab could be ''disabled'', so that you could output the KPA into a transparent solid state amp feeding into a real guitar cabinet. Or you could swap out the cab profile with another one, preserving the key aspects of the amp profile, but getting the unique sound of the new cab/mic.
However, a couple key things stood out. A key part of the sound of a real rig (as well as Kemper profiles ) are the ''interaction between the amp and cab'', which forms a unique impedance. Disabling the cab and using the same real cab as was used for the profile didn't quite get the same sound as the real amp and cab. So Kemper introduced a new profiling method in FW 3.0 to create another type of profile, called '''mergedprofiles''' profiles, which required merging a profile making 2 profiles: one of the full rig (amp + cab) and one of just the amp (without cab) by using a DI box. The cab profile from the first gets copied onto the DI profile of just the amp, and the merge process is performed when the new [[#Rig|rig]] is saved. The merged profile uses the combined data to get a faithful reproduction of the profiled amp connected to the real cab used to profile, allowing identical sound while running simultaneously to a real cab and to a PA system.
Here's a list of the different terms used for the different kind of profiles: